Improvement in stone pavements



1. BOLLIGER.

Improvement in Stone-Pavements.

No. 131,931; y Patenten om. 1872.

.QQNQ 4 M UNITED STATES PATENT {DIFFICIIv JACOB BOLLICER, or sAN FRANCISCO, CALIFORNIA..

IMPROVEMENT IN `STONE PAVEMENTS;`

Specific/ation forming part of Letters Patent No. 131,931, dated October 8, 1872.

1 annexed drawing making part and parcel of this my specification.

The` nature and Object of my invention is the utilization and adaptation of the ordinary Cobble-stone now usedfor paving purposes, so as to make and secure a comparatively smooth surface for the passage of vehicles over such pavement, thereby preventing the great jar to carriages and great injury to the feet of animals that are now experienced in the manner in which Cobble-stone pavement i is and has been usually constructed.

In the drawing, Figure l represents a section of my improved pavement as laid down upon'a street 5 and Fig. 2, a cross-vertical section of the same.

In order to enable others skilled in the art to make, construct, and use my pavement, I will describe my mode of construction of the same.

The ordinary cobble stone is usually of an oblong or elliptical form, and found in most sections of the country. In the use of this stone, for 'the purposes designed, those are preferable that are about six inches in length by four inches in width, representing the longest and shortest diameters of such stone. Other sizes, however, can be used when desired or convenient. VFrom one-fourth to onefifth (more or less) of such stone is clipped oif by means of a suitable hammer, leaving a attened surface upon the stone; the stones when thus prepared are then laid in the road or street to be paved, with the flattened surfaces upward, and in such a manner as to -stones These stones usually come in contact with each other at about their centers, leaving interstices between them both above and below such points of Contact. As such stones are embedded in loose sand or gravel, when the same are driven down by the pounder or hammer the sand or gravel fills the under spaces between the stones, and sand or gravel -their upper surfaces filling the upper spaces between .the stones. Thus a smooth and even surface is formed, and the bearin g of carriages, carts, orother vehicles rests upon two or more stones at the point of contact with them.

The advantages of this mode of construction of pavement are apparent, as it is frequently the case that such stones are more accessible than other kinds used for the purpose, requiring no machinery or skilled artisans to prepare them for use, and, when laid in the manner herein described, they present a uniform and smooth surface. Y Y

4What I claim as my invention, and desire to secure by Letters Patent, is-

The within-described construction and arrangement of Cobble-stone pavements, with the surface thereof iiattened, smoothed, and leveled when laid, in the'manner herein described. J AGOB BOLLIGER.

Witnesses A. EvERUTT BALL,

LOUIS DUTERTIIE.

break joints with each successive layer Of or other suitable material is then spread uponv 

